package com.lxk.concurrency.example.atomic;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicInteger;

import com.lxk.concurrency.annoations.ThreadSafe;

@ThreadSafe
public class AtomicExample1 {

	// 请求总数
	public static int clientTotal = 5000;

	// 同时并发执行的线程数
	public static int threadTotal = 200;

	public static AtomicInteger count = new AtomicInteger(0);

	public static void main(String[] args) throws Exception {
		ExecutorService executorService = Executors.newCachedThreadPool();
		final Semaphore semaphore = new Semaphore(threadTotal);

		final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);

		for (int i = 0; i < clientTotal; i++) {

			executorService.execute(() -> {
				try {

					semaphore.acquire();
					add();
					semaphore.release();

				} catch (Exception e) {
					System.out.println(e);
				}
				countDownLatch.countDown();
			});
		}
		countDownLatch.await();
		executorService.shutdown();

		System.out.println("count:" + count);
	}

	private static void add() {
		count.incrementAndGet();
		// count.getAndIncrement();
	}
}
